Perhaps they are a bit more natural because very few have bothered to optimize for Bing. There algo looks even easier to spam than Google though.
Back to Google. There have been some major experiments this year that have been short lived and I think (really am hoping) what we are seeing now is another short term test and we will go back to something more palatable in the last week of the month.
Meanwhile I'm finding ways to pull run of site links out of template hot spots (like the footer) and into content. Those Textpattern custom fields will be finding a very useful purpose. This could be a good thing and make us a bit more creative and on-topic with each page.